AT&T has announced its third quarter fiscal results. The company activated 4.7 million iPhones during the quarter, an increase of one million over the previous quarter.

For the quarter ending Sept. 30, AT&T's consolidated revenues totaled US$31.5 billion, flat versus the year-earlier quarter. When excluding the divested Advertising Solutions business unit, AT&T’s consolidated revenues grew 2.6%. Compared with results for the third quarter of 2011, operating expenses were $25.4 billion versus $25.2 billion, up 0.7 percent year over year; excluding Advertising Solutions, operating expenses were $25.4 billion versus $24.6 billion in the year-ago quarter, up 3.4 percent. Operating income was $6.0 billion, down from $6.2 billion; and AT&T’s operating income margin was 19.2 percent, compared to 19.8 percent.

Third-quarter 2012 net income attributable to AT&T totaled $3.6 billion, or $0.63 per diluted share, consistent with $3.6 billion, or $0.61 per diluted share, in the year-earlier quarter. When adjusted for Advertising Solutions, earnings per share was $0.62 compared to $0.59 in the year-ago quarter.

While AT&T didn't break out iPhone sales numbers by the type of Apple smartphone, the company said that its overall postpaid sales numbers were impacted by "inventory constraints" for the iPhone 5.